{"publication_id":"5e2a61ca-d8e8-4213-a48c-4774ee35a459","content_hash":"sha256:372dafeec9895e37d7d6a2a82ab8f7be4419ddb388c78ffc5e780335917e86f3","nodes":[{"id":"5e2a61ca-d8e8-4213-a48c-4774ee35a459","type":"publication","title":"Research Synthesis: Melatonin aging — full paper"},{"id":"claim_1","type":"claim","text":"This paper synthesizes evidence on Melatonin aging across 50 accepted source papers and 2895 high-confidence extracted claims."},{"id":"claim_2","type":"claim","text":"The evidence profile contains 17 direct clinical sources, 33 adjacent clinical sources, and no sources classified primarily as mechanistic or model-system evidence, with 581 cross-study disagreements across the evidence base."},{"id":"claim_3","type":"claim","text":"Positive study-level signals are summarized in the cardiometabolic and longevity outcome classes, null signals in the contextual adjacent evidence, dosing and pharmacokinetics, safety and comorbidity outcome classes, and negative signals in the contextual adjacent evidence outcome class. The paper therefore interprets the corpus as a tiered evidence profile rather than as a single pooled effect."},{"id":"claim_4","type":"claim","text":"The conclusion is that Melatonin aging remains a bounded geroscience case: the retained clinical and adjacent evidence profile defines the scope for targeted testing, while mixed and null findings limit any unqualified anti-aging claim."},{"id":"claim_5","type":"claim","text":"For that reason, the manuscript does not collapse every source into a single recommendation. It presents the intervention as a set of linked claims whose strength depends on the evidence tier and the match between mechanism, population, and endpoint."},{"id":"claim_6","type":"claim","text":"This synthesis evaluates evidence on Melatonin aging across 50 included source papers and 2895 high-confidence extracted claims. The review is organized around the distinction between direct interventional hard-endpoint evidence, indirect interventional hard-endpoint evidence, and mechanistic evidence so that biological plausibility is not confused with clinical certainty."},{"id":"claim_7","type":"claim","text":"The corpus contains 17 direct clinical sources, 33 adjacent clinical sources, and no sources classified primarily as mechanistic or model-system evidence. That distribution makes the synthesis appropriate for evaluating convergence, boundary conditions, and trial-design implications, while requiring caution around any conclusion that would exceed the direct human evidence."},{"id":"claim_8","type":"claim","text":"The thesis is: Across 50 curated reference papers, the evidence base for Melatonin shows a context-dependent profile. Positive signals appear in: cardiometabolic, longevity. Negative signals appear in: contextual other. Null findings dominate: contextual other, dosing pharmacokinetics. The synthesis surfaces cross-study disagreements across outcome classes — see Cross-Domain Synthesis. The Melatonin anti-aging case as currently constituted is incomplete: mechanistic plausibility coexists with mixed or sparse human-RCT evidence, and the boundary conditions remain to be established. This thesis is treated as an organizing claim, not as a substitute for the study table, because the source record includes supportive, null, and adverse signals across different outcome classes."},{"id":"claim_9","type":"claim","text":"This distinction matters for publication because it makes the paper falsifiable. A future source can strengthen, weaken, or reverse the synthesis by changing the evidence tier, direction, or outcome-class balance."},{"id":"claim_10","type":"claim","text":"The mechanistic layer is most useful when it explains why a trial signal might appear or fail to appear. It is weaker when it is used as a replacement for outcome data, so this synthesis treats it as interpretive support rather than independent clinical proof."},{"id":"claim_11","type":"claim","text":"Null findings have a specific role in this evidence model. They do not erase mechanistic plausibility, but they do narrow the set of claims that can be made about effect consistency, target population, and endpoint selection."},{"id":"claim_12","type":"claim","text":"Adverse or negative signals are likewise retained in the main interpretation. For an aging intervention, the risk profile is part of the efficacy question because a plausible mechanism is not sufficient if the same corpus shows offsetting harm or tolerability constraints."},{"id":"claim_13","type":"claim","text":"The evidence base also distinguishes breadth from certainty. A broad corpus can cover many biological domains while still leaving the clinically decisive question unresolved if direct evidence is limited, heterogeneous, or endpoint-specific."},{"id":"claim_14","type":"claim","text":"The background evidence for Melatonin aging is heterogeneous rather than uniformly confirmatory. Direct clinical sources such as Movahedian 2025, Casper 2024, Butler 2025 are interpreted separately from mechanistic studies such as the retained evidence base, because these evidence roles answer different questions about aging biology and clinical translation."},{"id":"claim_15","type":"claim","text":"The direct evidence establishes what has been observed in human or adjacent clinical settings. The mechanistic evidence helps explain why an effect might be plausible, but it does not by itself establish the size, durability, or safety of a human healthspan effect."},{"id":"claim_16","type":"claim","text":"Across the retained sources, positive signals cluster around the cardiometabolic and longevity outcome classes; null signals around the contextual adjacent evidence, dosing and pharmacokinetics, safety and comorbidity outcome classes; and negative or adverse signals around the contextual adjacent evidence outcome class. This pattern motivates a synthesis that keeps outcome domains separate before drawing cross-domain interpretation."},{"id":"claim_17","type":"claim","text":"The study-level structure also prevents selective emphasis. Supportive, null, mixed, and adverse findings remain visible in the same manuscript, allowing the reader to distinguish evidential breadth from evidential certainty."},{"id":"claim_18","type":"claim","text":"The resulting paper is therefore a calibrated synthesis: it can identify plausible mechanisms, observed direct signals when present, unresolved tensions, and trial-design priorities without converting them into claims stronger than the retained corpus can support."},{"id":"claim_19","type":"claim","text":"The following fields were extracted from each included source: study design, population / cohort, intervention or exposure, comparator, outcome class, effect direction, effect size, confidence interval or credible interval, p-value, sample size, follow-up duration, risk-of-bias rating. Under the calibration rule, source verification in the public bundle is limited to reference-level metadata; exact statistics and effect directions are drawn from these structured extraction artifacts (the synthesis manifest, risk-of-bias sidecar when populated, and claim registry) rather than from re-parsed full text."},{"id":"claim_20","type":"claim","text":"Risk-of-bias framework assignment follows study design (RoB-2 for RCTs, ROBINS-I for non-randomised studies, AMSTAR-2 for systematic reviews / meta-analyses). Public appraisal claims are limited to populated `risk_of_bias.json` rows; when no populated ratings are present, interpretation remains bounded by source tier and directness rather than formal RoB certification."},{"id":"claim_21","type":"claim","text":"Evidence-tension synthesis: claims grouped by outcome class (cardiometabolic, contextual adjacent evidence, deficiency prevalence, dosing and pharmacokinetics, immune and inflammation, longevity, muscle function, safety and comorbidity, skeletal, fracture, and bone); within-class agreement, disagreement, and directness gaps surfaced explicitly. Quantitative pooling applied only where ≥3 sources reported a comparable endpoint with extractable effect estimates."},{"id":"claim_22","type":"claim","text":"Source retrieval, claim extraction, evidence routing, and prose drafting were assisted by large language models under a deterministic audit-trail protocol. Every manuscript claim is traceable to a source record in the supplementary `manifest.json`. Final eligibility and interpretation decisions are author-verified."},{"id":"claim_23","type":"claim","text":"| Evidence domain | Corpus slice | Strongest signal | Directness | Main limitation |"},{"id":"claim_24","type":"claim","text":"| Contextual Adjacent Evidence | n=34; claims=1717 | no extracted directional signal in 30/34 sources | 12 direct; 12 indirect; 1 protocol; 9 review | limited corpus depth in this outcome class |"},{"id":"claim_25","type":"claim","text":"Outcome-class note:** Contextual Adjacent Evidence denotes background, boundary-condition, or adjacent-outcome sources. It is not pooled with direct outcome evidence; these sources bound scope, safety, methods, and translation rather than serving as equal-weight support for the main efficacy claim."},{"id":"claim_26","type":"claim","text":"Contextual Adjacent Evidence: n=34; claims=1717; no extracted directional signal in 30/34 sources | directness: 12 direct; 12 indirect; 9 review; 1 protocol; main limitation: directionally heterogeneous."},{"id":"claim_27","type":"claim","text":"Five curated studies form the cardiometabolic evidence base. Mohammadi 2025 reported a dose of 5 mg. Movahedian 2025 reported a dose of 5 mg. Mohammadi 2025b is a random-effects systematic review and dose–response meta-analysis of melatonin supplementation on cardiometabolic risk factors."},{"id":"claim_28","type":"claim","text":"Mechanistically, the cardiometabolic findings map onto the corpus pathway of oxidative-stress modulation and inflammation suppression. In a clinical RCT, Casper 2024 demonstrated that pre-surgical melatonin loading reduced post-ischemic inflammation with P = 0.0001 on a key inflammatory endpoint. Movahedian 2025 reported a dose of 5 mg. Preclinical and indirect human data, represented by Mohammadi 2025 and Lv 2025, suggest that the same antioxidant substrate extends to glycemic and postoperative recovery contexts, although with non-uniform signal strength across comparator timepoints."},{"id":"claim_29","type":"claim","text":"Within-corpus tensions are prominent in this outcome class. The two direct RCTs — Casper 2024 and Movahedian 2025 — agree on a positive cardiometabolic direction, with overlapping significant p-values on inflammatory and oxidative endpoints (e. For example, P = 0.005 in both, P = 0.0001 in Casper 2024, P = 0.001 in Movahedian 2025). The boundary between direct RCT evidence (Casper 2024, Movahedian 2025) and indirect observational or review-level evidence (Mohammadi 2025, Lv 2025, Mohammadi 2025b) remains the principal source of within-corpus disagreement and is preserved throughout this synthesis."},{"id":"claim_30","type":"claim","text":"Across the curated melatonin corpus, the largest single outcome class — Contextual Adjacent Evidence — clusters heterogeneous indications (sleep onset and quality, peri-operative and ICU delirium, cognitive function, reproductive endocrinology, vaccination, hemodialysis, periodontal repair, pediatric IV cannulation, multiple-myeloma–associated sleep disturbance, and Parkinsonian motor symptoms) under one umbrella, and the studies disagree on direction more often than they agree."},{"id":"source_1","type":"source","study":"Melatonin administered postoperatively lowers oxidative stress and inflammation and significantly recovers heart function in patients undergoing CABG surgery","year":2025,"doi":"10.1186/s40001-025-02789-9","url":"https://doi.org/10.1186/s40001-025-02789-9","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_2","type":"source","study":"Effects of melatonin on advanced glycation end products, inflammation, and oxidative stress in peritoneal dialysis patients: a randomized controlled trial","year":2025,"doi":"10.1038/s41598-025-20792-2","url":"https://doi.org/10.1038/s41598-025-20792-2","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_3","type":"source","study":"Exploring the role of melatonin in managing sleep and motor symptoms in Parkinson’s disease: a pooled analysis of double-blinded randomized controlled trials","year":2025,"doi":"10.1007/s10072-025-08221-8","url":"https://doi.org/10.1007/s10072-025-08221-8","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_4","type":"source","study":"Comprehensive Effects of Melatonin Supplementation on Cardiometabolic Risk Factors: A Systematic Review and Dose–Response Meta-Analysis","year":2025,"doi":"10.3390/nu18010134","url":"https://doi.org/10.3390/nu18010134","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"review-level"},{"id":"source_5","type":"source","study":"Melatonin ameliorates inflammation and improves outcomes of ischemia/reperfusion injury in patients undergoing coronary artery bypass grafting surgery: a randomized placebo-controlled study","year":2024,"doi":"10.1007/s10495-024-02040-6","url":"https://doi.org/10.1007/s10495-024-02040-6","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_6","type":"source","study":"A Series of Personalized Melatonin Supplement Interventions for Poor Sleep: Feasibility Randomized Crossover Trial for Personalized N-of-1 Treatment","year":2025,"doi":"10.2196/58192","url":"https://doi.org/10.2196/58192","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_7","type":"source","study":"Melatonin, Caffeine, or Their Combination: Effects on Sleep, Performance, Perceived Exertion in a Placebo-Controlled Crossover Study","year":2026,"doi":"10.3390/nu18091425","url":"https://doi.org/10.3390/nu18091425","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_8","type":"source","study":"Evaluating the antioxidant and anti-inflammatory effect of melatonin in pediatric hemodialysis patients: a randomized, placebo-controlled trial","year":2026,"doi":"10.1038/s41598-025-34264-0","url":"https://doi.org/10.1038/s41598-025-34264-0","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_9","type":"source","study":"Pharmacologic neuroprotective agents for the treatment of perinatal asphyxia in low-income and lower-middle-income countries: A systematic review and meta-analysis of randomised controlled trials","year":2025,"doi":"10.1371/journal.pone.0337798","url":"https://doi.org/10.1371/journal.pone.0337798","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"review-level"},{"id":"source_10","type":"source","study":"Melatonin agonist tasimelteon (HETLIOZ ® ) improves sleep in patients with primary insomnia: A multicenter, randomized, double-blind, placebo-controlled trial","year":2025,"doi":"10.1371/journal.pone.0332366","url":"https://doi.org/10.1371/journal.pone.0332366","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"review-level"},{"id":"source_11","type":"source","study":"Effect of melatonin versus placebo for the prevention of delirium among medically hospitalised older patients: a double-blinded randomised controlled trial (project RESTORE)","year":2026,"doi":"10.1136/bmjopen-2025-107775","url":"https://doi.org/10.1136/bmjopen-2025-107775","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_12","type":"source","study":"Hepatic Safety of Adjunctive High-Dose Melatonin in Participants Receiving Ocrelizumab for Primary Progressive Multiple Sclerosis: Liver Toxicity Findings from a Phase I/II Randomised Clinical Trial (MELATOMS-1)","year":2026,"doi":"10.1007/s40263-025-01261-w","url":"https://doi.org/10.1007/s40263-025-01261-w","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_13","type":"source","study":"Melatonin supplementation reduces delirium incidence in critically ill patients: a systematic review and meta-analysis","year":2026,"doi":"10.3389/fphar.2026.1728873","url":"https://doi.org/10.3389/fphar.2026.1728873","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"review-level"},{"id":"source_14","type":"source","study":"Timing-dependent effects of melatonin supplementation on exercise performance and exercise-induced muscle damage: a systematic review and meta-analysis","year":2026,"doi":"10.3389/fnut.2026.1742464","url":"https://doi.org/10.3389/fnut.2026.1742464","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"review-level"},{"id":"source_15","type":"source","study":"Melatonin Regulates Arylhydrocarbon Receptor Mediated UVR‐Induced Processes Related to Inflammation, Skin Aging and Carcinogenesis in Human Ex Vivo Skin","year":2026,"doi":"10.1111/exd.70235","url":"https://doi.org/10.1111/exd.70235","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_16","type":"source","study":"Melatonin for prevention of delirium in patients receiving mechanical ventilation in the intensive care unit: a multiarm multistage adaptive randomized controlled clinical trial (DEMEL)","year":2025,"doi":"10.1007/s00134-025-08002-z","url":"https://doi.org/10.1007/s00134-025-08002-z","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_17","type":"source","study":"Oral Melatonin in Critically Ill Patients With COVID‐19: A Quasi‐Experimental Pragmatic Trial","year":2026,"doi":"10.1002/jmv.70807","url":"https://doi.org/10.1002/jmv.70807","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_18","type":"source","study":"Melatonin as a Possible Stimulus to Unmask an Oxytocin-Deficient State in Hypopituitarism and Hypothalamic Damage","year":2025,"doi":"10.1210/clinem/dgaf201","url":"https://doi.org/10.1210/clinem/dgaf201","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_19","type":"source","study":"Effect of melatonin versus placebo for prevention of delirium among medically hospitalised patients: study protocol for a single-centre, double-blinded, randomised controlled trial (project RESTORE)","year":2025,"doi":"10.1136/bmjopen-2024-094195","url":"https://doi.org/10.1136/bmjopen-2024-094195","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_20","type":"source","study":"Sleep quality and sleepiness in adults with multiple myeloma. Is melatonin a potential treatment?","year":2026,"doi":"10.14814/phy2.70805","url":"https://doi.org/10.14814/phy2.70805","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_21","type":"source","study":"A systematic review and meta-analysis of randomized controlled trials investigated the effects of melatonin supplementation on bone mineral density, quality of life, and sleep in menopausal women","year":2026,"doi":"10.3389/fnut.2026.1687221","url":"https://doi.org/10.3389/fnut.2026.1687221","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"review-level"},{"id":"source_22","type":"source","study":"Effect of melatonin on cognitive function in adults with cognitive impairment: a multi-dimensional meta-analysis of randomized trials","year":2025,"doi":"10.1186/s13195-025-01881-w","url":"https://doi.org/10.1186/s13195-025-01881-w","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"review-level"},{"id":"source_23","type":"source","study":"Melatonin Use in Young Children","year":2026,"doi":"10.1001/jamanetworkopen.2025.51958","url":"https://doi.org/10.1001/jamanetworkopen.2025.51958","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_24","type":"source","study":"Acute High Dose Melatonin for Encephalopathy of the Newborn (ACUMEN) Study: a protocol for a multicentre phase 1 safety trial of melatonin to augment therapeutic hypothermia for moderate/severe hypoxic ischaemic encephalopathy","year":2025,"doi":"10.1136/bmjopen-2025-107083","url":"https://doi.org/10.1136/bmjopen-2025-107083","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_25","type":"source","study":"Transcutaneous auricular vagal nerve stimulation improves functional dyspepsia with sleep disturbance via enhanced vagal activity: a randomized controlled trial","year":2025,"doi":"10.1097/JS9.0000000000003296","url":"https://doi.org/10.1097/JS9.0000000000003296","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_26","type":"source","study":"The effect of melatonin supplementation on lipid profile, oxidative stress, inflammatory marker, and sleep quality in patients with chronic kidney disease: a GRADE assessed meta-analysis","year":2026,"doi":"10.3389/fnut.2026.1772877","url":"https://doi.org/10.3389/fnut.2026.1772877","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"review-level"},{"id":"source_27","type":"source","study":"Preoperative 15 mg of melatonin for reducing anxiety and post-traumatic stress disorder symptoms in mandibular third molar surgery: A randomized double-blind placebo-controlled clinical trial","year":2026,"doi":"10.4317/medoral.27846","url":"https://doi.org/10.4317/medoral.27846","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"primary"},{"id":"source_28","type":"source","study":"Melatonin for preventing postoperative delirium in elderly patients: A multicenter randomized placebo-controlled pilot study","year":2025,"doi":"10.1097/MD.0000000000041615","url":"https://doi.org/10.1097/MD.0000000000041615","population":"not extracted","intervention_or_exposure":"not extracted","comparator":"not extracted","endpoint":"not extracted","effect":"not extracted","risk_of_bias":"not appraised in public sidecar","directness":"review-level"},{"id":"source_29","type":"source","study":"A prospective randomized crossover trial investigating melatonin versus sleep deprivation for sleep induction in nap electroencephalography","year":2025,"doi":"10.1002/epi4.70169","url":"https://doi.org/10.1002/epi4.70169","population":"not extracted","intervention_or_exposure":"not 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